package com.eos.common.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

/**
 * 
 * @author administrator 2011-04-14
 * 
 * 
 */
public class SetCharacterEncodingFilter implements Filter {

	protected String encoding = null;

	protected FilterConfig filterConfig = null;

	/**
	 * encoding=null,filterConfig=null.
	 */
	public void destroy() {

		this.encoding = null;
		this.filterConfig = null;

	}

	/**
	 * 
	 * 
	 * @param request
	 * 
	 * @param response
	 * 
	 * @param chain
	 * 
	 * @throws IOException
	 * 
	 * @throws ServletException
	 * 
	 */
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		request.setCharacterEncoding(encoding);
		response.setContentType("text/html; charset=" + this.encoding);
		chain.doFilter(request, response);

	}

	/**
	 * 
	 * 
	 * @param filterConfig
	 * 
	 */
	public void init(FilterConfig filterConfig) throws ServletException {
		this.filterConfig = filterConfig;
		this.encoding = filterConfig.getInitParameter("encoding");
	}

}
